package com.sixiaolong.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sixiaolong.common.BaseContext;
import com.sixiaolong.common.CustomException;
import com.sixiaolong.dao.OrderDao;
import com.sixiaolong.domain.*;
import com.sixiaolong.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderDao, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    //    用户下单  分到订单表和  订单明细表
    @Override
    @Transactional
    public void submit(Orders orders) {
//        获取用户id
       Long userId = BaseContext.getCurrentId();
//        查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(lqw);
//        如果购物车是空的那么不必要去下单
        if (shoppingCarts == null||shoppingCarts.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
//        查询用户数据
        User user = userService.getById(userId);
//        查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null){
            throw new CustomException("地址信息有误，请核实");
        }

        long orderId = IdWorker.getId();  //订单号
//        原子类  不惧怕多线程带来的影响
        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetails = shoppingCarts.stream().map(e -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(e.getNumber());
            orderDetail.setDishFlavor(e.getDishFlavor());
            orderDetail.setDishId(e.getDishId());
            orderDetail.setSetmealId(e.getSetmealId());
            orderDetail.setImage(e.getImage());
            orderDetail.setName(e.getName());
//            单个商品的金额
            orderDetail.setAmount(e.getAmount());
//            计算购物车总体的金额
            amount.addAndGet(e.getAmount().multiply(new BigDecimal(e.getNumber())).intValue());
            return orderDetail;
//             BigDecimal count = multiply e.getNumber()*e.getAmount();
        }).collect(Collectors.toList());
//        向订单表插入一条数据
        orders.setNumber(String.valueOf(orderId));
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName()==null?"":addressBook.getProvinceName())
                        +(addressBook.getCityName()==null?"":addressBook.getCityName())
                        +(addressBook.getDistrictName()==null?"":addressBook.getDistrictName())
                        +(addressBook.getDetail()==null?"":addressBook.getDetail()));
        this.save(orders);
//        向订单明细表插入多条数据
        orderDetailService.saveBatch(orderDetails);
//        清除购物车
//        LambdaQueryWrapper<ShoppingCart> lqw1 = new LambdaQueryWrapper<>();
//        lqw1.eq(ShoppingCart::getUserId,userId);
        shoppingCartService.remove(lqw);
    }
}
